I'm Nikola Jeremić - certified NASM Personal trainer and Virtual Coaching Specialist, former pro athlete, and someone who has lived every high and low of performance, injury, and comeback.
I know what it’s like to be at your lowest, injured, emotionally drained, far from family, without support, to face temptations.
I know how to rise back to the top.
Ten years in professional sports. Five surgeries. Zero excuses.
I’ve been through every challenge you’re facing now. I know the path to the top.
From bouncing back from setbacks to building peak performance. From flawless nutrition and perfect timing, to the vital importance of sleep, recovery, and healthy outlets.
I’ve played in multiple countries, represented national team of my country, and competed on the biggest stages. I’ve trained under countless coaches with different philosophies and styles. I learned something from each one and what didn’t work taught me how not to do it.
I’ve lived a life where there’s no room for weakness. In professional sports, you quickly learn there’s no such thing as “good enough.” Every day is a test, and results are the only currency.
When you get injured, you learn you’re your own greatest support. Five surgeries didn’t stop me. From every setback, I came back stronger, more prepared, and mentally unbreakable.
Today, I bring you what books can’t teach, a system proven in the real world, under the harshest conditions.
Training that delivers results. Nutrition that works for you. Sleep and recovery that recharge your reserves. Mental toughness that keeps you going when others give up.
The Ragukai System is the product of years of testing and experience, combined with NASM educations, the gold standard in the fitness industry. It’s not just a program, it’s a transformation. I live by this system too.
When we work together, what you think is impossible today becomes your everyday reality!
My mission is simple but powerful:
To inspire people to believe in their own potential and create a life they are proud of - through fitness, discipline, mindset, and purpose.
I believe fitness is not a phase. It's a lifestyle, a foundation, and a daily ritual of self-respect.
That's why I created Ragukai Fitness - a movement, not just a coaching service.
With years of experience and a deep understanding of body mechanics, fat loss, muscle building, and performance, I create personalized programs tailored to real people and real lives.
MY WHY
To lead by example and help others break their limits.
HOW
By combining science-backed training, real nutrition, accountability, and mindset work.
WHAT I OFFER
Premium coaching tailored to your goals, lifestyle, and identity.
Whether you want to look insane on the beach, feel confident shirtless, or move and perform like an athlete - I'll get you there.
